钢筋混凝土箱型肋拱桥维修加固及受力分析

Maintenance, Reinforcement and Force Analysis of the Reinforced Concrete Box Ribbed Arch Bridge

本文以G321线上的一座钢筋混凝土箱型肋拱桥为实例,分析桥梁产生病害的原因,并提出维修加固方案,包括桥面系的改造以提高行车安全和舒适性,减小桥面系恒载降低主拱圈的负担,关键部位将箱型肋拱转换成整体式箱型拱,提高拱圈的抗扭、抗弯及承压能力,最后通过建立空间有限元模型对加固桥梁进行验算分析。

This article takes a reinforced concrete box ribbed arch bridge on the G321 line as an example to analyze the causes of bridge damage and put forward the maintenance and reinforcement plans,including the renovation of the bridge floor system to improve the safety and comfort of driving,reducing the permanent load of the bridge floor system to lower the burden on the main arch ring,and converting the box ribbed arch into an integral box arch at key locations,improving the anti torsion,anti bending,and pressure bearing capacity of the arch ring.Finally,a spatial finite element model is established to verify and analyze the reinforced bridge.